The Razor's Edge by W. Somerset Maughm
The Teachings of Don Juan, A Yaqui Way of Knowledge by Carlos Castenada
Autobiography of a Yogi by Paramahansa Yogananda
Hells Angels by Hunter S. Thompson
The Prophet by Kahlil Gibran
Sand Pebbles by Richard McKenna
Taijiquan: The Art of Nurturing, The Science of Power by Yang Yang
Atlas Shrugged by Ayn Rand
Zen and the Art of Motorcycle Maintenance by Robert Pirsig
Walden and Civil Disobedience by Henry David Thoreau
Discover the Power Within You by Eric Butterworth
Moby Dick by Herman Melville
Writing Down the Bones by Natalie Goldgerg
Ella Minnow Pea by Mark Dunn
The Infinite Way by Joel Goldsmith
This is of course not comprehensive. One could go on forever with this. These are a few of the books that have had the most impact on me. In fact, I can hardly imagine life without having read these. As noted, this isn't a suggestion of any sort, just a sorting of inspiration.